Whitney Cameron is in a quandary: he's attracted to his beautiful sister-in-law, Lynn, but also harbors serious suspicions about her. Her husband, Cameron's brother, died under mysterious circumstances, and now that the death of her stepchild, Polly, has been attributed to poisoning, he suspects that Lynn is after his late brother's estate, and killing everyone in her way.

Joseph Cottenas Whitney 'Cam' Cameron
Jean Petersas Lynn Cameron
Gary Merrillas Fred Sargent
Catherine McLeodas Maggie Sargent
Jack Kruschenas Harold Y. Cole
Barney Phillipsas Detective Captain Pringle
Harry Carteras Wheeler (uncredited)
James Gonzalezas Joe Cunningham (uncredited)
Ed Hintonas Ed (uncredited)